Lock box



FIG. 1 is a perspective view of a lock box showing my new design;

FIG. 2 is another perspective view thereof, shown in a used condition;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a back view thereof;

FIG. 6 is a side view thereof;

FIG. 7 is a front view thereof; and,

FIG. 8 is an opposite side view thereof.

The broken lines shown in the drawings represent portions of the lock box that form no part of the claimed design. 

CLAIM The ornamental design for a lock box, as shown and described. 